|Source: Ocean Prediction Center|
Determining whether or not Nuri is the deepest in the analyzed history of the North Pacific requires more sleuthing. The analysis by Burt (2011) suggests that the previously deepest cyclone to affect Alaska reached 925 mb, so there's a chance Nuri tops this (barely!). However, there are a number of issues that make determining if Nuri is record breaking for the north Pacific as a whole difficult:
- Cyclone central pressures derived from computer analyses over the oceanic regions prior to the satellite era and even since the advent of the satellite era have considerable uncertainty with regards to the minimum central pressure. As a result, one can't simply do a search through digital analyses to see if Nuri is the deepest.
- Going through manual analyses is a tedious process. Groups have done it, but often for subsets of years or decades and sometimes for regions rather than the entire north Pacific.
- Manual analyses are not exact. In the analysis above, the analyst has estimated the central pressure based on the surrounding observations (e.g., there is a 952 mb observation just east of the Kamchatka Peninsula), satellite imagery, and experience, but this is a source of uncertainty as well. Ironically, pressure observations near the center of deep low centers are more rare today than in the past because ships and freighters typically know such storms are coming days in advance and adjust their routes to avoid mayhem.
Based on the records I have access to, it appears Nuri is amongst the deepest of the deep. Whether or not it ends up being the deepest on record depends ultimately on what the weather historians and analysts have to say.